I'm new to Excel Formulas that are as extensive as this, yes to me this was hard :P

I wish to add to this Formula as it works as intended:

=IF(AND(MOD(B11,1)>=(7/24),MOD(B11,1)<=(17.5/24)),"Day Shift",IF(OR(MOD(B11,1)<(4.5/24),MOD(B11,1)>=(18/24)),"Night Shift",""))

What I want to add, is the Cell (that I am putting this formula into) just to be Blank if nothing is in the B11 Cell:

=IF(ISBLANK(B11),""))

How do I add this?

Thank you for your time